/* ─── Reset & base ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #FFFFFF;
  --bg-subtle: #F5F7FA;
  --bg-dark:   #0D1B2A;
  --red:       #CC1E3A;
  --amber:     #E08A1E;
  --text:      #0D1B2A;
  --text-mid:  #374151;
  --text-muted:#6B7280;
  --border:    #E5E7EB;
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06);
  --shadow:    0 4px 20px rgba(0,0,0,0.08);
  --max-w:     980px;
  --font:      'Inter', system-ui, -apple-system, sans-serif;
  --radius:    10px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-mid);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ─── Typography ─── */
h1 { font-size: clamp(2.2rem, 5vw, 3.2rem); line-height: 1.12; font-weight: 800; color: #fff; letter-spacing: -0.03em; }
h2 { font-size: 1.55rem; font-weight: 700; color: var(--text); letter-spacing: -0.02em; margin-bottom: 0.5rem; }
h3 { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: 0.3rem; }
p  { margin-bottom: 0.9rem; }
p:last-child { margin-bottom: 0; }
strong { color: var(--text); font-weight: 600; }
a { color: var(--red); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Container ─── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.75rem;
}

section { padding: 5rem 0; }

/* ─── Section label ─── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 0.9rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 16px;
  height: 2px;
  background: var(--red);
  border-radius: 1px;
}

/* ─── Nav ─── */
nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.75rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-logo-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--red);
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
}
.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.nav-links a:hover { background: var(--bg-subtle); color: var(--text); }

/* ─── Nav gender toggle ─── */
.nav-gender-toggle {
  display: flex;
  gap: 0.25rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
}
.nav-gender-btn {
  padding: 0.28rem 0.85rem;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: background 0.15s, color 0.15s;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.nav-gender-btn:hover { color: var(--text); }
.nav-gender-btn.active { background: var(--bg-dark); color: #fff; }

/* ─── Hero ─── */
.hero {
  background: var(--bg-dark);
  padding: 7rem 1.75rem 5.5rem;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 1.4rem;
}
.hero-eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--red);
}
.hero h1 { max-width: 700px; margin-bottom: 1.1rem; }
.hero-subtitle {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.52);
  max-width: 580px;
  line-height: 1.65;
  margin: 0;
}

/* ─── Hero stats bar ─── */
.hero-stats {
  display: flex;
  gap: 0;
  margin-top: 4rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2.5rem;
  flex-wrap: wrap;
  gap: 2.5rem;
}
.hero-stat-item {}
.hero-stat-value {
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  font-weight: 800;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.04em;
  display: block;
}
.hero-stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  display: block;
  margin-top: 0.4rem;
}

/* ─── Gender toggle ─── */
.gender-toggle {
  display: flex;
  gap: 0.5rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.gender-btn {
  padding: 0.4rem 1.1rem;
  border-radius: 999px;
  border: 1.5px solid rgba(255,255,255,0.25);
  background: transparent;
  color: rgba(255,255,255,0.6);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  letter-spacing: 0.02em;
}
.gender-btn:hover { background: rgba(255,255,255,0.1); color: #fff; }
.gender-btn.active { background: #fff; color: var(--bg-dark); border-color: #fff; }

/* ─── About section ─── */
#about {
  border-bottom: 1px solid var(--border);
}
#about p { font-size: 0.97rem; color: var(--text-mid); max-width: 680px; }
#about p + p { margin-top: 0.6rem; }

/* ─── Findings ─── */
#findings { background: var(--bg-subtle); }
.findings-intro { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 2.2rem; max-width: 560px; }
.findings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.finding-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
}
.finding-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.finding-number {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 0.6rem;
}
.finding-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.35rem;
}
.finding-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}

/* ─── Pace selector ─── */
#your-band { background: var(--bg); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.pace-intro { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 1.8rem; max-width: 560px; }

.band-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.band-btn {
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease, transform 0.18s ease;
  letter-spacing: -0.01em;
}
.band-btn:hover {
  border-color: var(--text-mid);
  color: var(--text);
  background: var(--bg-subtle);
  transform: translateY(-1px);
}
.band-btn.active {
  background: var(--text);
  border-color: var(--text);
  color: #fff;
}


.band-panel {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 2.2rem;
  box-shadow: var(--shadow-sm);
}
.band-panel-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.4rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.band-panel-title::before {
  content: '';
  display: block;
  width: 4px;
  height: 1.1em;
  background: var(--red);
  border-radius: 2px;
  flex-shrink: 0;
}
.band-stats {
  display: flex;
  gap: 3rem;
  margin-bottom: 1.6rem;
  flex-wrap: wrap;
}
.band-stat-val {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  letter-spacing: -0.03em;
}
.band-stat-lbl {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-top: 0.3rem;
}
.band-tip {
  font-size: 0.92rem;
  color: var(--text-mid);
  line-height: 1.7;
  margin: 0;
  padding-top: 1.4rem;
  border-top: 1px solid var(--border);
}
.band-tip strong { color: var(--red); font-weight: 600; }

/* ─── Canvas chart wrapper ─── */
.canvas-wrap {
  position: relative;
  width: 100%;
  height: 380px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 0.5rem 0.5rem;
}
.canvas-wrap canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* ─── Analysis section ─── */
#analysis { background: var(--bg); }
.analysis-intro { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 3rem; max-width: 620px; }

.chart-block {
  margin-bottom: 4rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid var(--border);
}
.chart-block:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.chart-label {
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.chart-block img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}
.chart-caption {
  margin-top: 1.2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.chart-caption h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.6rem;
  line-height: 1.3;
}
.chart-caption-text { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; }
.chart-caption-text p { margin-bottom: 0.7rem; }
.chart-caption-text p:last-child { margin: 0; }
.chart-caption-text strong { color: var(--text-mid); }

/* ─── Insight callout ─── */
.callout {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-left: 4px solid var(--amber);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.4rem 1.6rem;
  margin: 0 0 4rem;
  font-size: 0.92rem;
  color: var(--text-mid);
  line-height: 1.7;
}
.callout strong { color: var(--amber); }

/* ─── CTA link ─── */
.cta-link {
  display: inline-block;
  padding: 0.7rem 1.8rem;
  background: var(--text);
  color: #fff;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, transform 0.15s;
  letter-spacing: -0.01em;
}
.cta-link:hover { background: var(--red); transform: translateY(-1px); text-decoration: none; }

/* ─── Methodology ─── */
#methodology { background: var(--bg-subtle); }
.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin: 1.8rem 0 2.5rem;
}
.method-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
  box-shadow: var(--shadow-sm);
}
.method-card h3 { font-size: 0.88rem; margin-bottom: 0.4rem; }
.method-card p { font-size: 0.84rem; color: var(--text-muted); margin: 0; }

.limitations-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.9rem;
}
.limitation {
  display: flex;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.6rem;
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.limitation-icon {
  font-size: 0.8rem;
  margin-top: 0.15rem;
  flex-shrink: 0;
  color: var(--text-muted);
}

/* ─── Future work ─── */
#future { background: var(--bg); border-top: 1px solid var(--border); }
.future-intro { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 2rem; }
.future-list { list-style: none; }
.future-list li {
  display: flex;
  gap: 1.1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.future-list li:last-child { border-bottom: none; }
.future-list li strong { color: var(--text); font-weight: 600; display: block; margin-bottom: 0.2rem; }
.future-badge {
  flex-shrink: 0;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.22rem 0.55rem;
  border-radius: 4px;
  height: fit-content;
  margin-top: 0.2rem;
  white-space: nowrap;
}
.badge-phase2 { background: #EBF5FF; color: #1D64B0; }
.badge-data   { background: #ECFDF5; color: #166534; }
.badge-model  { background: #FFF8EC; color: #92560A; }

/* ─── Footer ─── */
footer {
  background: var(--bg-dark);
  padding: 2.5rem 1.75rem;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.3);
}
footer a { color: rgba(255,255,255,0.5); text-decoration: none; }
footer a:hover { color: rgba(255,255,255,0.8); text-decoration: underline; }
footer p + p { margin-top: 0.3rem; }
.footer-contact { color: rgba(255,255,255,0.65); font-size: 0.88rem; margin-bottom: 0.6rem; }
.footer-contact strong { color: rgba(255,255,255,0.85); }
.footer-contact a { color: rgba(255,255,255,0.65); }
.footer-contact a:hover { color: #fff; }

/* ─── Scroll reveal ─── */
.fade-up {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 650ms cubic-bezier(0.22, 1, 0.36, 1),
              transform 650ms cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .fade-up,
  .fade-up.is-visible {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ─── Hover enhancements ─── */
.curiosity-card {
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.curiosity-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.method-card {
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.method-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}


/* ─── Curiosities ─── */
#curiosities { background: var(--bg-subtle); border-top: 1px solid var(--border); }
.curiosities-intro { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 2.2rem; max-width: 600px; }
.curiosities-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}
.curiosity-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  box-shadow: var(--shadow-sm);
}
.curiosity-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  letter-spacing: -0.04em;
  margin-bottom: 0.5rem;
}
.curiosity-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.curiosity-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}
.curiosity-canvas-wrap {
  position: relative;
  width: 100%;
  height: 200px;
  margin-top: 1.1rem;
}
.curiosity-canvas-wrap canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
}

/* ─── Race Strategy Calculator ─── */
#calculator { background: var(--bg-subtle); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.calc-intro { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 2rem; max-width: 640px; }

.calc-panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 2.2rem;
  box-shadow: var(--shadow-sm);
}
.calc-inputs {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2.5rem;
  margin-bottom: 2rem;
  align-items: start;
}
.calc-input-group { display: flex; flex-direction: column; gap: 0.55rem; }
.calc-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.3rem;
}
.calc-pace-display { font-weight: 700; color: var(--red); }
.calc-select {
  padding: 0.6rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.92rem;
  font-family: var(--font);
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.8rem center;
  padding-right: 2.2rem;
}
.calc-select:focus { outline: none; border-color: var(--text-mid); }
.calc-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  border-radius: 3px;
  background: linear-gradient(to right, rgba(29,100,176,0.3), var(--border) 50%, rgba(204,30,58,0.3));
  outline: none;
  cursor: pointer;
}
.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--bg-dark);
  border: 2.5px solid #fff;
  box-shadow: 0 1px 6px rgba(0,0,0,0.22);
  cursor: pointer;
}
.calc-slider::-moz-range-thumb {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--bg-dark);
  border: 2.5px solid #fff;
  cursor: pointer;
}
.calc-slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}
.calc-output { padding-top: 1.6rem; border-top: 1px solid var(--border); }
.calc-result-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.calc-result-val {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  letter-spacing: -0.03em;
}
.calc-result-lbl {
  font-size: 0.69rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-top: 0.35rem;
}
.calc-status-ok   { color: #166534; }
.calc-status-warn { color: var(--amber); }
.calc-status-bad  { color: var(--red); }
.calc-fade-section { padding-top: 1.2rem; border-top: 1px solid var(--border); }
.calc-fade-label { font-size: 0.84rem; color: var(--text-mid); margin-bottom: 0.55rem; }
.calc-fade-label strong { color: var(--text); }
.calc-fade-track {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.calc-fade-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(to right, #166534, var(--amber), var(--red));
  transition: width 0.3s ease;
}
.calc-gender-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
}
.calc-footnote {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 1.2rem;
  max-width: 700px;
  line-height: 1.6;
}

/* Desktop: hide the in-menu gender row */
.nav-gender-mobile { display: none; }

/* ─── Hamburger button ─── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
  border-radius: 6px;
  transition: background 0.15s;
}
.nav-hamburger:hover { background: var(--bg-subtle); }
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.22s ease, opacity 0.22s ease;
  transform-origin: center;
}
.nav-hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Names & Countries pages ─── */
.nav-active { color: var(--red) !important; font-weight: 600; }

/* Name frequency charts — 2-up grid */
.nc-freq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 0;
}
.nc-chart-heading {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* Typical runner card */
.nc-typical-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 2rem 1.5rem;
}
.nc-typical-header { margin-bottom: 1.5rem; }
.nc-typical-header h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.3rem; }
.nc-typical-header p  { font-size: 0.87rem; color: var(--text-muted); }
.nc-typical-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}
.nc-typical-item { display: flex; flex-direction: column; gap: 0.3rem; }
.nc-typical-val  { font-size: 1.45rem; font-weight: 800; color: var(--red); line-height: 1.1; }
.nc-typical-lbl  { font-size: 0.78rem; color: var(--text-muted); }
.nc-typical-note { font-size: 0.82rem; color: var(--text-muted); border-top: 1px solid var(--border); padding-top: 1rem; margin: 0; }

/* Same-name table */
.nc-table-wrap { overflow-x: auto; }
.nc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.nc-table th {
  text-align: left;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  padding: 0.5rem 0.75rem;
}
.nc-table td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}
.nc-table tr:last-child td { border-bottom: none; }
.nc-time-fast { color: rgba(29,100,176,0.9); font-variant-numeric: tabular-nums; }
.nc-time-slow { color: rgba(204,30,58,0.9);  font-variant-numeric: tabular-nums; }

/* Diversity / stat blocks */
.nc-diversity-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 0;
}
.nc-diversity-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.nc-diversity-num  { font-size: 2.5rem; font-weight: 800; color: var(--red); line-height: 1; margin-bottom: 0.35rem; }
.nc-diversity-lbl  { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-muted); margin-bottom: 0.6rem; }
.nc-diversity-desc { font-size: 0.87rem; color: var(--text-muted); line-height: 1.6; margin: 0; }

/* Responsive ─── */
@media (max-width: 768px) {
  .nc-freq-grid      { grid-template-columns: 1fr; }
  .nc-typical-grid   { grid-template-columns: repeat(2, 1fr); }
  .nc-diversity-grid { grid-template-columns: 1fr; }
  .about-stats       { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .nc-typical-grid   { grid-template-columns: 1fr; }
}

/* ─── About page ─── */
.about-body {
  max-width: 680px;
  margin: 3.5rem auto 3rem;
}
.about-section {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0 2rem;
  padding-bottom: 2.5rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
}
.about-section-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  padding-top: 0.25rem;
}
.about-section-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.9rem;
  color: var(--text);
}
.about-section-content p {
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--text-mid);
  margin: 0 0 0.9rem;
}
.about-section-content p:last-child { margin-bottom: 0; }

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin: 0 auto 2.5rem;
  max-width: 680px;
}
.about-stat {
  background: var(--bg);
  padding: 1.4rem 1.2rem;
  text-align: center;
}
.about-stat-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
}
.about-stat-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.about-stack {
  max-width: 680px;
  margin: 0 auto 4rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.about-stack-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}
.about-stack-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.about-stack-tag {
  font-size: 0.78rem;
  font-weight: 500;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--text-mid);
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .findings-grid    { grid-template-columns: 1fr 1fr; }
  .method-grid      { grid-template-columns: 1fr; }
  .chart-caption    { grid-template-columns: 1fr; gap: 0.8rem; }
  .nav-hamburger { display: flex; }
  .nav-inner {
    height: auto;
    flex-wrap: wrap;
    padding: 0 1rem;
    gap: 0;
  }
  .nav-logo {
    flex: 1;
    padding: 0.7rem 0;
  }
  .nav-hamburger {
    align-self: center;
  }
  .nav-gender-toggle {
    display: flex;
    width: 100%;
    justify-content: center;
    padding: 0.45rem 0;
    border-top: 1px solid var(--border);
    gap: 0.4rem;
    order: 10;
  }
  .nav-gender-toggle .gender-btn,
  .nav-gender-toggle .nav-gender-btn {
    font-size: 0.8rem;
    padding: 0.3rem 1rem;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    padding: 0.5rem 0 0.75rem;
    gap: 0;
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 0;
    color: var(--text);
    white-space: nowrap;
  }
  .nav-links a:hover { background: var(--bg-subtle); }
  .hero-stats       { gap: 1.8rem; }
  .band-stats       { gap: 1.5rem; }
  .calc-inputs      { grid-template-columns: 1fr; gap: 1.5rem; }
  .calc-result-grid { grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
  .curiosities-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .findings-grid { grid-template-columns: 1fr; }
  .hero { padding: 5rem 1.25rem 4rem; }
  .band-panel { padding: 1.4rem 1.2rem; }
  .calc-panel { padding: 1.4rem 1.2rem; }
}